package com.senven.settled.config;

import java.util.Random;

/**
 * @Author wt
 * @Date 2022/9/6 19:12
 * @PackageName:com.wt.controller
 * @ClassName: xx
 * @Description: 随机生成账号和密码
 * @Version 1.0
 */
public class Factory {
    //生成随机用户名，数字和字母组成,
    public static String getRandomCharacters(int length) {

        String val = "";
        Random random = new Random();

        //参数length，表示生成几位随机数
        for (int i = 0; i < length; i++) {

            String charOrNum = random.nextInt(2) % 2 == 0 ? "char" : "num";
            //输出字母还是数字
            if ("char".equalsIgnoreCase(charOrNum)) {
                //输出是大写字母还是小写字母
                int temp = random.nextInt(2) % 2 == 0 ? 65 : 97;
                val += (char) (random.nextInt(26) + temp);
            } else if ("num".equalsIgnoreCase(charOrNum)) {
                val += String.valueOf(random.nextInt(10));
            }
        }
        return val;
    }

}
